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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <filesystem>
// space_info space(const path& p);
// space_info space(const path& p, error_code& ec) noexcept;
#include "filesystem_include.h"
#include <sys/statvfs.h>
#include "test_macros.h"
#include "rapid-cxx-test.h"
#include "filesystem_test_helper.h"
using namespace fs;
bool EqualDelta(std::uintmax_t x, std::uintmax_t y, std::uintmax_t delta) {
if (x >= y) {
return (x - y) <= delta;
} else {
return (y - x) <= delta;
}
}
TEST_SUITE(filesystem_space_test_suite)
TEST_CASE(signature_test)
{
const path p; ((void)p);
std::error_code ec; ((void)ec);
ASSERT_SAME_TYPE(decltype(space(p)), space_info);
ASSERT_SAME_TYPE(decltype(space(p, ec)), space_info);
ASSERT_NOT_NOEXCEPT(space(p));
ASSERT_NOEXCEPT(space(p, ec));
}
TEST_CASE(test_error_reporting)
{
static_test_env static_env;
auto checkThrow = [](path const& f, const std::error_code& ec)
{
#ifndef TEST_HAS_NO_EXCEPTIONS
try {
space(f);
return false;
} catch (filesystem_error const& err) {
return err.path1() == f
&& err.path2() == ""
&& err.code() == ec;
}
#else
((void)f); ((void)ec);
return true;
#endif
};
const path cases[] = {
"",
static_env.DNE,
static_env.BadSymlink
};
for (auto& p : cases) {
const auto expect = static_cast<std::uintmax_t>(-1);
std::error_code ec;
space_info info = space(p, ec);
TEST_CHECK(ec);
TEST_CHECK(info.capacity == expect);
TEST_CHECK(info.free == expect);
TEST_CHECK(info.available == expect);
TEST_CHECK(checkThrow(p, ec));
}
}
TEST_CASE(basic_space_test)
{
static_test_env static_env;
// All the test cases should reside on the same filesystem and therefore
// should have the same expected result. Compute this expected result
// one and check that it looks semi-sane.
struct statvfs expect;
TEST_REQUIRE(::statvfs(static_env.Dir.c_str(), &expect) != -1);
TEST_CHECK(expect.f_bavail > 0);
TEST_CHECK(expect.f_bfree > 0);
TEST_CHECK(expect.f_bsize > 0);
TEST_CHECK(expect.f_blocks > 0);
TEST_REQUIRE(expect.f_frsize > 0);
auto do_mult = [&](std::uintmax_t val) {
std::uintmax_t fsize = expect.f_frsize;
std::uintmax_t new_val = val * fsize;
TEST_CHECK(new_val / fsize == val); // Test for overflow
return new_val;
};
const std::uintmax_t bad_value = static_cast<std::uintmax_t>(-1);
const std::uintmax_t expect_capacity = do_mult(expect.f_blocks);
const std::uintmax_t expect_free = do_mult(expect.f_bfree);
const std::uintmax_t expect_avail = do_mult(expect.f_bavail);
// Other processes running on the operating system may have changed
// the amount of space available. Check that these are within tolerances.
// Currently 5% of capacity
const std::uintmax_t delta = expect_capacity / 20;
const path cases[] = {
static_env.File,
static_env.Dir,
static_env.Dir2,
static_env.SymlinkToFile,
static_env.SymlinkToDir
};
for (auto& p : cases) {
std::error_code ec = GetTestEC();
space_info info = space(p, ec);
TEST_CHECK(!ec);
TEST_CHECK(info.capacity != bad_value);
TEST_CHECK(expect_capacity == info.capacity);
TEST_CHECK(info.free != bad_value);
TEST_CHECK(EqualDelta(expect_free, info.free, delta));
TEST_CHECK(info.available != bad_value);
TEST_CHECK(EqualDelta(expect_avail, info.available, delta));
}
}
TEST_SUITE_END()
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